KELT-10

KELT-10
Observation data; Epoch J2000.0 Equinox ICRS
Constellation	Telescopium
Right ascension	18h 58m 11.6095s
Declination	−47° 00′ 11.664″
Apparent magnitude (V)	+10.62
Characteristics
Spectral type	G0 V
B−V color index	+0.72
Variable type	PT
Astrometry
Radial velocity (Rv)	31.61±1.29 km/s
Proper motion (μ)	RA: +1.464 mas/yr ; Dec.: −15.600 mas/yr
Parallax (π)	5.2834±0.0174 mas
Distance	617 ± 2 ly ; (189.3 ± 0.6 pc)
Details
Mass	1.07+0.12; −0.15 M☉
Radius	1.21+0.05; −0.03 R☉
Luminosity	1.40±0.02 L☉
Surface gravity (log g)	4.32+0.02; −0.03 cgs
Temperature	5,948±74 K
Metallicity [Fe/H]	+0.1±0.1 dex
Age	4.5±0.7 Gyr
Other designations
	CD−47°12635, KELT-10, TIC 269217040, Gaia DR2 6710517793025165696
Database references
SIMBAD	data

KELT-10, also known as CD−47°12635, is a sun-like star in the southern constellation Telescopium. It has an apparent magnitude of 10.62, making it readily visible in telescopes, but not to the naked eye. Parallax measurements from the Gaia spacecraft place the star at a distance of 617 light years; it is currently receding with a radial velocity of 31.6 km/s.

KELT-10 has a stellar classification of G0 V, indicating that it is a yellow dwarf like the Sun. However, the object is 7% more massive and 21% larger. It is also slightly hotter, with an effective temperature of 5,948 K compared to the Sun's of 5,778 K. The star has a similar age, with an age of 4.5 billion years and more luminous, having a luminosity 40% greater. KELT-10's iron abundance is 123% that of the Sun, consistent with a planetary host. However, this amount is poorly constrained.

Planetary system

In 2015, a "hot Jupiter" orbiting the star was discovered by the KELT-South telescope. KELT-10b orbits at a distance 10 time closer than Mercury orbits the Sun, and is bloated due to its orbit.

The KELT-10 planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination (°)	Radius
b	0.68±0.04 `M`_J	0.052±0.001	4.1662739±0.0000063	0 (assumed)	88.61^+0.86 _−0.74	1.4±0.1 `R`_J

References

↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
1 2 3 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
1 2 3 4 5 6 7 8 Kuhn, Rudolf B.; et al. (15 April 2016). "KELT-10b: the first transiting exoplanet from the KELT-South survey – a hot sub-Jupiter transiting aV= 10.7 early G-star". Monthly Notices of the Royal Astronomical Society. 459 (4): 4281–4298. arXiv:1509.02323. Bibcode:2016MNRAS.459.4281K. doi:10.1093/mnras/stw880. eISSN 1365-2966. ISSN 0035-8711.
1 2 3 4 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
1 2 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.

[Roman1987-1] Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.

[DR3-2] 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[Tycho2000-3] 1 2 3 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.

[Kuhn2016-4] 1 2 3 4 5 6 7 8 Kuhn, Rudolf B.; et al. (15 April 2016). "KELT-10b: the first transiting exoplanet from the KELT-South survey – a hot sub-Jupiter transiting aV= 10.7 early G-star". Monthly Notices of the Royal Astronomical Society. 459 (4): 4281–4298. arXiv:1509.02323. Bibcode:2016MNRAS.459.4281K. doi:10.1093/mnras/stw880. eISSN 1365-2966. ISSN 0035-8711.

[GaiaDR2-5] 1 2 3 4 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[TIC-6] 1 2 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.